Towards a global performance indicator for losses from water supply systemsReport as inadecuate

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1 UR REBX - Réseaux épuration et qualité des eaux

Abstract : GLI Global Leakage Index which is the product of ILI Infrastructure Leakage Index and PMI Pressure Management Index seems to be relevant to preliminary assess the level of losses of a water supply system, in particular while an evaluation of average pressure of the network is unavailable. GLIE, an approximated value of GLI, can be derived from only CARL Current Annual Real Losses and Nc number of connections. This approach allows to connect international PIs with French reference values, based on the LLI Linear Leakage Index as function of the customer density or based on the CLI Customer Leakage Index. As it was shown by the case study, GLIE-s advantage is that it is easily calculated even by services disposing of few information. This PI is nevertheless useful in the first stage of a more involved analysis when data on pressure is available. Future studies will concern the investigation of GLI in order to assess its relevance and to examine the interest of evaluation of the ILI-s estimated value ILIE.


Author: E. Renaud -



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